EP1920421A2 - Procede et systeme de prediction de choc entre un vehicule et un pieton - Google Patents
Procede et systeme de prediction de choc entre un vehicule et un pietonInfo
- Publication number
- EP1920421A2 EP1920421A2 EP06779034A EP06779034A EP1920421A2 EP 1920421 A2 EP1920421 A2 EP 1920421A2 EP 06779034 A EP06779034 A EP 06779034A EP 06779034 A EP06779034 A EP 06779034A EP 1920421 A2 EP1920421 A2 EP 1920421A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- vehicle
- pedestrian
- shock
- importance
- particle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 63
- 239000002245 particle Substances 0.000 claims abstract description 117
- 230000007423 decrease Effects 0.000 claims abstract description 3
- 230000035939 shock Effects 0.000 claims description 124
- 238000004088 simulation Methods 0.000 claims description 31
- 230000008569 process Effects 0.000 claims description 9
- 238000012795 verification Methods 0.000 claims description 4
- 230000004083 survival effect Effects 0.000 claims description 3
- 238000012217 deletion Methods 0.000 claims description 2
- 230000037430 deletion Effects 0.000 claims description 2
- 230000001629 suppression Effects 0.000 claims description 2
- 238000011156 evaluation Methods 0.000 claims 1
- 238000000342 Monte Carlo simulation Methods 0.000 abstract description 9
- 238000012360 testing method Methods 0.000 description 7
- 238000004364 calculation method Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000011002 quantification Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002123 temporal effect Effects 0.000 description 2
- 241000283070 Equus zebra Species 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
- B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
- B60R21/0134—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to imminent contact with an obstacle, e.g. using radar systems
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/16—Anti-collision systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/02—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to ambient conditions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
- B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/08—Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/08—Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
- B60W30/09—Taking automatic action to avoid collision, e.g. braking and steering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
- B60W50/08—Interaction between the driver and the control system
- B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
Definitions
- the present invention relates to a method for predicting impact between a vehicle and a mobile pedestrian, with the aim of improving the safety of pedestrians. It is particularly applied in a pre-crash pedestrian protection system, which triggers suitable countermeasures such as an emergency braking or a change of trajectory of the vehicle, a few moments before the shock against a pedestrian detected in the vicinity. before the vehicle. It also relates to an embedded system for implementing said method.
- a pedestrian pre-crash system must be able to predict a vehicle-pedestrian shock with an estimate of a risk of impact in a very short time, between a few hundred milliseconds and a second, in order to trigger appropriate reactions to avoid the shock. predicts or limits the consequences.
- This system receives information on the dynamic state of the vehicle, its engine speed, the position of the various controls of the driver, information on the pedestrian (s) detected, such as their size, position or speed, for example, to estimate the risk. that a vehicle-pedestrian shock occurs between two instants t 0 and t 0 + ⁇ T.
- This quantification consists in: - drawing an initial number N of particles corresponding to the pairs of vehicle and pedestrian trajectories originating from the situation whose impact characteristics are to be evaluated, the state of the particles depending on the measurements and estimates delivered by the system's obstacle detection sensor, to predict particle trajectories, then to test, for each discrete time step, whether there is a collision between the vehicle and each particle corresponding to the pedestrian .
- P Ch oc the probability of shock
- the time before impact can be estimated by taking the average of the times before impact of the trajectories which end with an impact.
- the uncertainties affecting the evolution of the pedestrian trajectory are quantified by the probability distribution.
- the object of the invention is to propose an improved shock prediction between a vehicle and a pedestrian of the probabilistic type.
- a first object of the invention is a method for predicting a collision between a vehicle and a detected mobile pedestrian, comprising a phase of generation of N particles representing pairs of vehicle and pedestrian trajectories, originating from the situation whose shock characteristics are to be evaluated, from a vehicle model and a pedestrian model with several discrete states, as well as from the initial positions of the vehicle and the pedestrian and information on their states respective kinematics, followed by a phase of evaluating the outcome of each particle, characterized in that the space of the states of the particles is divided into areas of variable importance defined as a numerical value directly related to the interest granted to each particle and depending on its current kinematic state, and in that in case of non-shock predicted for a particle tested, the method calculates the relationship between the importance of the particle at the moment and its importance to the previous instant in order to decide, in the case of a particle whose importance increases, to multiply it to an integer n, greater than 1, particles each assigned a new weight and, in the case of a particle whose the
- the calculation of vehicle-pedestrian shock prediction allows a result in real time.
- the division of the space in front of the vehicle, according to the instantaneous orthonormal coordinate system attached to the front of the vehicle, is made from the relative distance between the vehicle and the pedestrian, defining important areas in the form of circular rings, centered on the middle of the bumper of the vehicle and whose diameter is the bumper.
- the division of the space in front of the vehicle is made from the longitudinal component of the relative velocity due to the vehicle and its lateral component which is assimilated to that of the pedestrian, defining areas of importance in the form of ellipses, centered on the middle of the bumper of the vehicle, half-small axis on the y-axis and half-major axis on the x-axis.
- the cutting of the space in front of the vehicle, according to the instantaneous orthonormal coordinate system attached to the front of the vehicle, is performed according to the value of the lifetime of the particle, or time before overtaking, necessary so that the longitudinal position of the pedestrian is at the front of the vehicle, at each moment t, the simulation, and the shorter this life is, the greater the importance of the area is large, only the longitudinal position of the pedestrian and its speed then being taken into account, defining areas of importance in the form of strips parallel to the ordinate axis.
- the division of the space in front of the vehicle, according to the instantaneous orthonormal coordinate system attached to the front of the vehicle, is made from the direction of the relative velocity of the pedestrian with respect to the vehicle, obtained either by the tangent arc of the ratio between its longitudinal speed and its lateral speed, or by the arc tangent of the relation between the speed of the pedestrian and that of the vehicle:
- the shock prediction method comprises the following steps:
- N 1 a number of particles, each weighted and corresponding to a pair of simulated trajectories for the vehicle and the pedestrian at the instant (t,), and for each of which a kinematic state is simulated which is then compared to the initial state, - if there is shock, estimation and memory characteristics of the shock, before deleting the particle k considered and continue the simulation with the following particle k + 1 until N ⁇ th particle,
- this trajectory k does not have a growing interest and the process proceeds to the following simulated trajectory k + 1, "if ⁇ ,, k is less than 1, the random suppression by a step of "Russian roulette" of the particle that is irrelevant, with attribution of a new weight if it survives,
- a second object of the invention is a system for implementing the method for predicting the collision between a vehicle and a detected mobile pedestrian, on board the vehicle, comprising means for detecting obstacles in the vehicle environment, associated means for estimating their position and their speed, connected to vehicle / pedestrian shock prediction means, which moreover receive information on the dynamics of the vehicle equipped with said system from sensors connected to the controls of the vehicle these shock prediction means associating with each detected obstacle a shock probability, a time before impact, a predicted shock zone and possibly an impact velocity, which they send to means of selecting the optimal countermeasure that the system must be applied urgently to protect the pedestrian identified.
- FIG. 1 a non-limiting example of a flow diagram of the vehicle-pedestrian shock prediction method
- FIG. 2 a nonlimiting example of Monte-Carlo simulation, with a number N particles, in the reference of the vehicle,
- FIG. 3 is a diagrammatic view from above of a vehicle and a pedestrian, with an orthonormal mark
- FIG. 4 an example of geometric modeling of a frontal collision between a vehicle and a pedestrian
- FIG. 5 a variant of definition of the shock zone
- the method for predicting the collision between a vehicle and a mobile pedestrian is of probabilistic type, each pedestrian trajectory model state variable being able to take a set of values with which probabilities are associated, which makes it possible to quantify the risks.
- the purpose of the method is to estimate, for a given vehicle-pedestrian situation, the probability of shock between the present instant to and the time limit of prediction t o + ⁇ T, where ⁇ T is the temporal prediction horizon, and d estimate the characteristics of the impact, namely the time before impact, the impact zone and the speed of impact in particular.
- the method takes account of the fact that the trajectories of the different particles do not all have the same interest.
- the particles that are far from the shock zone which corresponds to a pedestrian crossing in front of the vehicle at a distance greater than 30 meters for example, are much less interesting than the particles. which are in the vicinity of the shock zone. Therefore, the risk quantification being done by simulations of Monte Carlo-type trajectories, the method according to the invention uses variance reduction methods, such as "splitting" or "Russian roulette” of applying a sampling of importance on the states to improve the performance of the simulation.
- the method firstly consists in generating an initial number N of particles, each corresponding to a pair of trajectories of the vehicle and the pedestrian, the state of the particles depending on the measurements and estimates delivered by the pedestrian detection sensor of the system equipping the vehicle, then to treat the N particles by testing, at every moment for each particle, if there is a collision between the vehicle and the pedestrian.
- the method evaluates the outcome of each pair of trajectories and, firstly, memorizes the number of particles susceptible to impact, with their weight, their position and speed characteristics, and secondly, allocates in the case of non-shock predicted, at each moment, at each moment, a numerical value directly related to the interest granted to this particle and called "importance"; it depends on the present kinematic state (position, speed ...) of the particle. He notes the evolution of the importance of the particle to calculate its final weight which will depend on the areas of importance it has borrowed. Finally, to estimate the probability of shock during the duration of the simulation, the process is the sum of the weights of the particles for which the simulation ends with a shock and estimates the characteristics of the shock predicted from statistics, such as time before impact. , impact zone or impact velocity.
- the method calculates the significance ratio ⁇ between the present state of the particle and its state at the previous instant.
- the method focuses on the next particle.
- the process will perform a step of "splitting", that is to say, the reduction of the particle whose importance increases. It is divided into an integer n, greater than 1, of new particles, each new particle being assigned the weight of the initial particle divided by n, this new weight serving in the calculation of the probability of shock.
- This number n is an increasing function of the importance ratio ⁇ of the particle considered.
- the method performs a step of "Russian roulette", that is to say random removal of said particle considered as irrelevant. It has a probability of survival p equal to the importance ratio ⁇ . Two cases can occur: it survives and its weight, serving for the probability of shock, is then multiplied by the inverse of the importance ratio ⁇ , or else it dies, its weight becomes zero and this trajectory is no longer used .
- each particle is assigned a weight which determines its contribution to the total mass of the cloud that it constitutes with the others, that is to say to the final calculation of the expectation of shock.
- it is necessary to re-sample the cloud in order to keep the number of particles bounded, when the number of particles N (t) is greater than the maximum number N max , defined according to the performances of the computer.
- the value 256 can typically be chosen.
- the method For each particle k of the N, particles simulated at instant t , the method generates a simulated state for the vehicle E v (t,) and a simulated state E P (t,) for the pedestrian at step e3) in order to proceed, in the next step e4), to a comparison test of these two states to determine whether, over the interval [t, _i, t,] there is shock and at which moment, or not shock, or if the pedestrian has left the defined shock zone between the pedestrian and the front of the vehicle. Definitions of this shock zone are proposed with reference to Figures 3, 4 and 5 below.
- the method carries out a step e5) of estimating the characteristics of the shock, in particular of the predicted moment of shock, of the shock zone and the probability of shock, and then memorizes them in step e6), before deleting the particle k considered in step e7) and continuing the simulation with the next particle k + 1 to the Nth particle.
- the method In the case of an output of the shock zone, without being shocked, the method also stores the characteristics of the trajectory k in step e6) before deleting it in step e7) and continues the simulation with the following particle k + 1 up to the N
- step e9 the value of the importance l ⁇ ? K associated with its new state at time t, in state space, as well as the ratio ⁇ , kk between the importance of this particle k at time t, and its value at time t, .i preceding.
- This ratio ⁇ ,? K makes it possible to measure the evolution of the importance of the particle k considered, that is why its value is then compared to 1 at step e10). If the ratio ⁇ ,? K is equal to 1, this trajectory is not of increasing interest and the process proceeds to the following simulated trajectory k + 1.
- step e1 1) strategy of "Russian roulette” randomly removing the particle that is irrelevant.
- the particle k is deleted in step e7), or it survives and a new weight p k is assigned to it in step e12).
- the method applies a step e13) strategy of 'splitting' which multiplies the particle considered to be significant into a number n (k) of new particles each assigned a weight, different of that of the important particle k, and which will be subsequently treated at the next instant t l + 1 .
- a new sampling step may be necessary to keep a reasonable number of particles.
- step e14 When the simulation checks in step e14) that it has considered all the N, particles, it checks that there will be particles to be treated at the next time step, so that the number N, +1 is positive, to step e15). Indeed, if for example all the particles result in shocks at time t, or at previous times, there will be more particles to be treated at the time step following t, +1 , so there is will have more to simulate trajectory. Then, the method estimates the probability of shock and the characteristics of the eventual shock from the statistics on the stored results, in step e16) final. To estimate the probability of shock P chO c between times t 0 and t o + ⁇ T, the process is the sum of the weights affecting the particles for which the simulation ends with a shock.
- FIG. 2 is an example of a Monte Carlo simulation, with a number N of particles, of the order of 250, in the reference of the vehicle, whose origin 0 is the center of the shock zone in the middle of the windshield of the vehicle, the axis of the abscissa Ox is directed in the plane of the road towards the front of the vehicle and the axis of ordinates Oy, also included in the plan of the road, is directed from right to left of the vehicle as shown in FIG. 3, which is a schematic view from above of a vehicle A and a pedestrian P.
- the trajectory predictions are made in the instantaneous orthonormal reference of the vehicle and the Shock tests require transposing the position of the pedestrian in this mark of the front of the vehicle.
- the speed of the latter is generally great compared to that of the pedestrian, and the method considers that, in this mark of the front face of the vehicle, the abscissa of the pedestrian is always decreasing in the time.
- the outcome of a pedestrian trajectory, in the relative reference of the vehicle can be of three kinds:
- the duration ⁇ T of a shock prediction therefore depends on the proportion of cases belonging to these three types of trajectory issues.
- the duration of trajectories ending in the first two exits, with abscissas close to 0, are substantially equal if it is assumed that the relative longitudinal movement of the pedestrian along the axis Ox is essentially due to the displacement of the vehicle.
- the invention relates solely to the prediction of frontal shocks between a pedestrian and the front of the vehicle which is modeled by a segment having the width dimension L of the vehicle, as shown in Figure 3.
- the pedestrian P is considered a cylinder of diameter 2R equal to the maximum width of an average pedestrian and of the same height as this average pedestrian, so that it is possible to define a vehicle / pedestrian shock zone corresponding to an intersection between a segment representative of the face front of the vehicle A and a representative disk of the pedestrian envelope P, as shown in Figure 4 which is an example of geometric modeling of a frontal impact between a vehicle and a pedestrian.
- the diameter 2R is equal to 60 cm.
- the simple shock zone Z s is a rectangle of width equal to 2R and of length equal to the sum of the width L of the vehicle and the diameter 2R of the pedestrian model.
- the "fine" shock zone Z f is the combination of a rectangle, length L and width 2R, and two half-circles of radius R at each end.
- the crash prediction test between a vehicle and a pedestrian consists in comparing the calculated probability of shock at a threshold, generally between 70 and 95%. If p is the probability of shock, the variance of the estimate of this probability by classical Monte Carlo simulation is p (1-p) / N, where N is the number of particles drawn and this variance in the vicinity of the detection threshold. is relatively important. According to an essential characteristic of the invention, the method defines regions or zones of importance such that, when a particle enters a zone of greater importance, it is multiplied, but on the contrary when it enters a region of 'lower importance, it can be eliminated randomly by' Russian roulette '. Different criteria on the situations between a vehicle and a pedestrian, in the reference of the front face, result in different divisions of the areas of importance.
- FIGS. 6 to 11 are nonlimiting examples of zones of importance in the case of a uniform rectilinear movement of the vehicle, the space in front of the vehicle being cut for example according to three zones related to the anticipated impact gravity: There is shock, no shock, or the shock is uncertain, among others.
- FIG. 6 shows a division of the space in front of the vehicle, according to the instantaneous orthonormal coordinate system attached to the front of the vehicle, made from the relative distance between the vehicle and the pedestrian alone without taking into account their relative speed, resulting areas shaped circular rings, centered on the middle of the bumper of the vehicle and whose diameter consists of the bumper.
- the first semicircular zone Si between the ordinates + Y C hoc and -Y C hoc corresponding to the two ends of the bumper of the vehicle has a great importance h because the shock is certain.
- the second annular zone S 2 consecutive to the first Si and between the ordinates + Y ⁇ nc and -Y ⁇ nc corresponding to an uncertain shock, has a maximum importance I 2 .
- the first ellipse E 1 has for half a minor axis the ordinate Y Ch oc and for half a major axis the product of Y Ch oc by the ratio of the speeds of the vehicle and the pedestrian: Y Ch oc * V V e h / V p ⁇ e .
- the second ellipse E 2 has for half minor axis the ordinate Y, nc and for half a major axis the product of Y, nc by the ratio of the speeds of the vehicle and the pedestrian: Y Ch oc * V V e h / V p ⁇ e and is of utmost importance.
- a third zone E 3 corresponds to the remainder of the half plane of the positive abscissae.
- the method proposes (FIG. 8) a cutting of the space in front of the vehicle, according to the instantaneous orthonormal coordinate system attached to the front of the vehicle, made according to the duration value.
- life ⁇ of the particle at each instant t, of the simulation This time ⁇ is also called time before passing, necessary for the longitudinal position of the pedestrian is at the front of the vehicle. The shorter this lifetime ⁇ is, the greater the importance of the area. In this case, only the longitudinal position x of the pedestrian and its speed V p are taken into account.
- the areas of importance are in the form of strips parallel to the ordinate axis
- the zone Z 1 of greater importance corresponds to a lifetime j between 0 and 0.5 seconds and is closest to the vehicle
- a second zone Z 2 of less importance corresponds to a lifetime j 2 between 0.5 and 1 second
- a third zone Z 3 is between 1 and 2 seconds duration life j -
- a last zone Z 4 corresponds to the remainder of the half plane of the positive abscissae.
- the division of the space is done taking into account the angular position of the pedestrian in the plane defined by the axes Ox and Oy of the vehicle mark, obtained with the ratio of its lateral position y on its longitudinal position x.
- the importance is small and a large number of sectors makes it possible to approach a continuous variation of the importance.
- the division of the space is made from the direction of the relative velocity of the pedestrian relative to the vehicle, obtained either by the arc tangent of the ratio between its longitudinal velocity and its lateral velocity. , or by the tangent arc of the ratio between the speed of the pedestrian V P ⁇ e and that of the vehicle V veh :
- the zones of importance are defined by isosceles triangles, of height In 1 on the axis Ox of abscissas and of base on the axis Oy of the ordinates and of angle ⁇ at the vertex defined by the arc tangent of the ratio between the pedestrian speed V P ⁇ e and that of the vehicle V veh : a
- V vehJ second zone A 2 has a base equal to 2 Y ⁇ nc and height Y ⁇ nc product by the ratio of the speed of the vehicle on that of the pedestrian, and its importance is maximum.
- a third zone A 3 corresponds to the remainder of the half plane of positive abscissae, with a smaller importance than that of the first zone.
- Three levels of importance can be defined according to the absolute value of y * : if y ⁇ y, the importance is large, shock if ⁇
- the implementation system embedded in the vehicle, comprises means for detecting obstacles in the vehicle environment, associated with estimation means of their position and their speed, connected to vehicle / pedestrian shock prediction means, which also receive information on the dynamics of the vehicle equipped with said system from sensors connected to the controls of the vehicle, these means of predicting shock associating with each detected obstacle a probability of shock, a time before impact, a predicted shock zone and possibly a probability of impact velocity, which they send to means of selecting the optimum countermeasure that the system must apply. in emergency to protect the pedestrian spotted.
- the method according to the invention requires less information, the distance of the pedestrian vehicle for example, without the direction of its speed in particular. This reduces the load and the power, therefore the size and the cost of the dedicated electronic computer, as well as that of the associated sensors.
- the shock prediction associated with the predicted impact time estimation allows the driver and / or the pedestrian to appreciate the seriousness of the situation, otherwise countermeasures are triggered. automatically.
- the driver and / or the pedestrian can also be alerted so that they trigger a maneuver to avoid or reduce the speed of impact by a change of trajectory, an emergency braking or others.
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- Automation & Control Theory (AREA)
- Mathematical Physics (AREA)
- Transportation (AREA)
- Radar, Positioning & Navigation (AREA)
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- General Physics & Mathematics (AREA)
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Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0508631A FR2889882B1 (fr) | 2005-08-19 | 2005-08-19 | Procede et systeme de prediction de choc entre un vehicule et un pieton. |
PCT/FR2006/050695 WO2007020358A2 (fr) | 2005-08-19 | 2006-07-10 | Procede et systeme de prediction de choc entre un vehicule et un pieton |
Publications (2)
Publication Number | Publication Date |
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EP1920421A2 true EP1920421A2 (fr) | 2008-05-14 |
EP1920421B1 EP1920421B1 (fr) | 2008-12-03 |
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ID=36222185
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP06779034A Not-in-force EP1920421B1 (fr) | 2005-08-19 | 2006-07-10 | Procede et systeme de prediction de choc entre un vehicule et un pieton |
Country Status (8)
Country | Link |
---|---|
US (1) | US20090143987A1 (fr) |
EP (1) | EP1920421B1 (fr) |
JP (1) | JP2009505260A (fr) |
KR (1) | KR20080053302A (fr) |
AT (1) | ATE416451T1 (fr) |
DE (1) | DE602006004071D1 (fr) |
FR (1) | FR2889882B1 (fr) |
WO (1) | WO2007020358A2 (fr) |
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EP1710131A1 (fr) * | 2005-04-04 | 2006-10-11 | IEE INTERNATIONAL ELECTRONICS & ENGINEERING S.A. | Procédé de classification pour système de protection de piétons |
JP4062353B1 (ja) * | 2006-11-10 | 2008-03-19 | トヨタ自動車株式会社 | 障害物進路予測方法、装置、およびプログラム |
EP2144217B1 (fr) * | 2007-03-29 | 2013-08-14 | Toyota Jidosha Kabushiki Kaisha | Dispositif d'acquisition de possibilité de collision, et procédé d'acquisition de possibilité de collision |
JP4450023B2 (ja) | 2007-07-12 | 2010-04-14 | トヨタ自動車株式会社 | 自車両危険度取得装置 |
JP4924492B2 (ja) * | 2008-03-12 | 2012-04-25 | トヨタ自動車株式会社 | 衝突予測装置 |
DE102008062916A1 (de) * | 2008-12-23 | 2010-06-24 | Continental Safety Engineering International Gmbh | Verfahren zur Ermittlung einer Kollisionswahrscheinlichkeit eines Fahrzeuges mit einem Lebewesen |
JP4748232B2 (ja) | 2009-02-27 | 2011-08-17 | トヨタ自動車株式会社 | 運転支援装置 |
US8577550B2 (en) * | 2009-10-05 | 2013-11-05 | Ford Global Technologies, Llc | System for vehicle control to mitigate intersection collisions and method of using the same |
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- 2006-07-10 DE DE602006004071T patent/DE602006004071D1/de active Active
- 2006-07-10 WO PCT/FR2006/050695 patent/WO2007020358A2/fr active Application Filing
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WO2007020358A2 (fr) | 2007-02-22 |
FR2889882A1 (fr) | 2007-02-23 |
WO2007020358A3 (fr) | 2007-05-24 |
JP2009505260A (ja) | 2009-02-05 |
DE602006004071D1 (de) | 2009-01-15 |
KR20080053302A (ko) | 2008-06-12 |
EP1920421B1 (fr) | 2008-12-03 |
FR2889882B1 (fr) | 2009-09-25 |
ATE416451T1 (de) | 2008-12-15 |
US20090143987A1 (en) | 2009-06-04 |
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